CN205109805U - Ore grinding system - Google Patents

Abstract

The utility model provides an ore grinding system, which includes a roller press, a steady flow bin, a wind classification system and a dynamic screening system, and is characterized in that: the ore grinding system is vertically arranged. The ore grinding system saves floor space, and in addition, there is no need to use a belt conveyor for transportation during material circulation, which saves huge costs and energy consumption. Moreover, no water is needed during ore grinding, which saves water resources, and the described The grinding system is used in places where water resources are scarce.

Description

a grinding system

Technical field:

The utility model relates to an ore grinding system, in particular to an ore grinding system for ferrous metals or nonferrous metals.

Background technique:

The current mature grinding technology is dry crushing + wet grinding. All equipment is placed flat on the ground, which covers a very large area, and the civil engineering foundation of the equipment is also very complicated, making construction difficult; A large amount of water is used for grinding, so the water consumption is large, and the tail drainage causes water pollution. The grinding of the prior art is broken by steel balls hitting the minerals. When the steel balls hit the materials, most of the steel balls did not hit the minerals, but hit the steel balls. Therefore, the grinding of the prior art There is about 50% useless work in the process, which increases power consumption.

Chinese patent CN102489373B discloses a kind of iron ore processing and beneficiation process. In this patent document, the process steps of dry grinding are mentioned: that is, 1. The hoist lifts the coarse ore with a particle size of <30mm after crushing to the first high place. On the second belt conveyor, the second belt conveyor is fed into the unpowered air separator; 2. The unpowered air separator separates the coarse ore from the fine ore powder, and the coarse ore with a particle size > 1.5mm enters under the action of its own weight In the steady flow bin below, the fine ore powder with a particle size of ≤1.5mm is selected under the action of wind, and sent to the power wind separator by wind force. Those skilled in the art have designed the grinding system shown in Fig. 1 , Fig. 2 and Fig. 3 according to this patent document. However, the following problems still generally exist in the production system made according to this patent document:

1. It occupies a large area. Based on the production scale with an hourly processing capacity of 70 tons, the area required for Figure 1, Figure 2 and Figure 3 is about 1200 square meters.

2. The conveying of materials is limited by the climbing angle of the belt conveyor. If the material is to be conveyed to the inlet of the next magnetic separator, the shortest length of the belt conveyor should not be less than L (calculation formula: L=h/tan (α), wherein: h is the minimum height of the feed port of the magnetic separator, and α is the maximum inclination angle of the belt conveyor); at the same time, the more the number of magnetic separators is, the more belt conveyors are needed, and the belt conveyor The larger the installation site, the greater the cost of the belt.

3. Calculated on the basis of a production line with an hourly processing capacity of 70 tons, Figure 1, Figure 2, and Figure 3 require at least 5 belt conveyors, and the consumption of belts is calculated based on the total processing capacity of 800,000 tons, and 10 sets of belts are required. Based on the production scale of 70 tons per hour, it will consume 23 kilowatt-hours of electricity per hour, which will lead to huge energy consumption.

4. For the fine powder obtained by the grinding of the prior art, the crushing of the metal mineral particles in the fine powder is the same as that of the gangue mineral particles. When the grinding fineness is too coarse, the concentrate grade will be reduced. The mineral particles have not been completely dissociated, so the selected concentrate contains gangue and the grade is low; when the grinding fineness is too fine, it will increase the difficulty of magnetic separation and no metal mineral particles can be selected.

Utility model content:

The purpose of the utility model is to provide a grinding system for ferrous or non-ferrous metals.

In order to achieve the above object, the utility model is achieved as follows: a grinding system, including a roller press, a steady flow bin, a wind classification system and a dynamic screening system, the grinding system is vertically arranged. The ore grinding system saves floor space, and in addition, there is no need to use a belt conveyor for transportation during material circulation, which saves huge costs and energy consumption. Moreover, no water is needed during ore grinding, which saves water resources, and the described The grinding system is used in places where water resources are scarce.

In order to further rationalize the layout of the grinding system, the roller press, the steady flow bin, the wind classification system and the dynamic screening system are arranged in three or four layers in the longitudinal direction; the roller press is located at the bottom, and the dynamic screening system is located at the top. , The steady flow chamber is located in the middle layer. The grinding system is in the best state in terms of structure and function.

Preferably, the roller press, the steady flow bin, the wind classification system and the dynamic screening system are arranged in four layers in the longitudinal direction, from the bottom layer to the top layer in sequence from the first layer to the fourth layer, and the roller press is arranged on the first layer, The steady flow bin is set on the second floor, the wind classification system is set on the third floor, and the dynamic screening system is set on the fourth floor. The grinding system occupies a very small area and is very conducive to the flow of materials, which saves the transmission distance and reduces the energy consumption of transmission, and improves the efficiency of the entire grinding system.

Preferably, the roller press, the steady flow bin, the wind classification system and the dynamic screening system are arranged in three layers in the longitudinal direction, the roller press is arranged on the bottom layer, the steady flow bin is arranged on the middle layer, the wind classification system and the dynamic screening system set on top. The wind force is the main driving force for the wind classification system to process materials. The separation energy loss of the grinding system is small and the separation efficiency is high.

Preferably, the roller press, the steady flow bin, the wind classification system and the dynamic screening system are arranged in three layers in the longitudinal direction, the roller press is arranged on the bottom layer, the steady flow bin is arranged on the middle layer, and the dynamic screening system is arranged on the top layer. The wind classification system is set on the ground floor. It is convenient for inspection and observation, maintenance and inspection.

Preferably, the roller press is connected to the steady flow bin, the steady flow bin is connected to the wind classification system, and the wind classification system is connected to the dynamic screening system.

In order to further increase the output of the grinding system, the dynamic screening system is connected with the steady flow bin. The output and grade of the grinding system are improved.

Preferably, the above-mentioned devices are connected by means of pipes, chute, non-standard chute or steel plate. It effectively eliminates the dust, improves the working environment of the workers, and at the same time reduces the energy consumed by the belt conveyor and the consumed belt, which saves costs and is more conducive to the circulation of materials.

In order to further reduce energy consumption, the grinding system also includes a hoist; the hoist is connected with the wind classification system and the roller press, and/or the hoist is connected with the wind classification system and the The steady flow warehouse is connected. Not only can the crushed coarse ore be easily sent to the wind classification system for classification, but also the energy consumption is reduced and the separation efficiency is greatly improved.

Preferably, the outlet of the elevator is connected to the wind classification system and/or the steady flow bin through pipes, chute, non-standard chute, steel plate or canvas, etc., and the inlet of the elevator is connected through pipes, chute, Non-standard chute, steel plate or canvas are connected with the roller press and/or the wind classification system.

In order to further avoid air pollution, the grinding system also includes a dust collection system, which is connected with the dynamic screening system. The dust collection system can recover the dust generated when the dynamic screening system screens the fine ore, so as to prevent the dust from being discharged into the air and pollute the environment.

During the ore grinding process, the crushed coarse ore first enters the wind classification system for classification, and the wind classification system classifies the coarse ore, selects the fine ore that meets the particle size requirements and sends it to the dynamic screening system, the coarse ore that does not meet the particle size requirements is fed into the steady flow bin, and then sent to the roller press through the collection and control of the steady flow bin, and the roller press performs roller grinding on the coarse ore Crushing, the coarse ore after rolling and grinding is sent to the wind classification system for classification; the dynamic screening system screens the fine ore, and selects the ultrafine ore that meets the particle size requirements and sends it to the next step process, the fine ore that does not meet the particle size requirements is fed into the steady flow bin, and then sent to the roller press through the collection and control of the steady flow bin, and the roller press performs fine ore Rolling and grinding, the coarse ore after rolling and grinding is sent to the elevator again to be lifted to the wind fan system for classification, and the above steps are repeated.

Beneficial effect

1. The grinding system of this utility model makes full use of space resources and greatly optimizes the overall structure of the system. Not only does the material flow more smoothly, but it also saves floor space. Calculated on the basis of a production scale with an hourly processing capacity of 70 tons, this The system occupies only 400-350 square meters or less, which is more than 71% less than the existing technology, and the material transmission distance of this system is only 150-70 meters, which reduces the transmission distance by 62-62 meters compared with the existing technology. 80%. At the same time, the whole system does not use water, which saves equipment costs and water resources.

2. The utility model has a good grinding effect. On the one hand, the quality of the ore material processed by this system is good. After being processed by the ore grinding system, the particle size of the ore powder can be adjusted within the range of 55% to 95% of -200 mesh. The product particle size can be adjusted in a wide range, which can be selected according to the actual production needs of users. On the other hand, the ore processed by the grinding system is in the form of a batch bed. The mineral particles are naturally dissociated and ground according to the crystal formation surface. The grinding is easier, so the processing capacity and efficiency can be improved, compared with a production line with a processing capacity of 70 tons per hour. The grinding capacity of the prior art is 70t/h, while the processing capacity of the system can reach 84-105t/h under the same scale, the grinding output can be increased by 20-50%, and the efficiency can be increased by 20-30%.

3. Compared with the production scale of 70 tons per hour, the utility model needs 18-13 kilowatt-hours of electricity, saving 20-43% of electricity.

4. The overall structure of the system, the location and connection mode of the devices, etc., greatly reduce the air pollution caused by the mineral processing process. The dust content of the air discharge is less than 20mg/Nm3, which is better than the environmental protection requirement that the dust emission requirement stipulated by the national standard is not more than 30mg/Nm3, and there is no air pollution.

5. The grinding, grading and sieving process of this system allows for smooth flow of materials without material silting and clogging, which not only ensures the quality of the product, but also improves the service life of the equipment and reduces maintenance costs.

6. In the process of processing coarse ore in this grinding system, the work done is fully utilized. The ore is extruded and pulverized under the action of pressure in the form of a material bed, and the mineral particles are squeezed and broken, and the work done by the external pressure is fully utilized.

7. The fine powder processed by this grinding system is more suitable for subsequent magnetic separation. Mineral particles are naturally dissociated and ground according to the crystal formation surface. Metal elements and gangue minerals are completely dissociated, which is suitable for subsequent magnetic separation. It is easier to select metal mineral particles in the process.

8. The mineral separation system of the utility model reduces the investment cost. The existing mineral separation system needs to build a tailings dam to deal with the waste water and waste generated after magnetic separation, but this mineral separation system only needs to collect the waste generated by the dust collection system. Dry dust collection and backfilling can solve the waste problem. Compared with the production scale of 1,700 tons of daily processing capacity, the investment cost of the existing technology on the tailings dam is about 60 million yuan, and the maintenance cost in the later period is also very high, requiring about 25 million yuan per year; and The utility model does not need to build a tailings dam, and only needs to backfill the collected tailing powder, so only about one million yuan is needed for the treatment of the tailings, and the expenditure can be saved by seven to eighty million yuan.

9. The comprehensive energy consumption of the mineral separation system of the present utility model is low, and the energy consumption of the mineral separation system during the working process is lower than the industry standard of the People's Republic of China for ferrous metallurgy——"Mining Enterprise Mining Production Energy Consumption Quota Standard Part 2: Iron The first-level standard of the comprehensive energy consumption per unit of raw ore beneficiation for the magnetic separation process and flotation process stipulated in the ore beneficiation YB/T4417.2-2014 is 30%.

Description of drawings

Fig. 1 is a grinding system 1 designed by those of ordinary skill in the art according to the background technology;

Fig. 2 is a grinding system 2 designed by those of ordinary skill in the art according to the background technology;

Fig. 3 is a grinding system 3 designed by those of ordinary skill in the art according to the background technology;

Fig. 4 is the structural diagram of embodiment 2;

Fig. 5 is the structural diagram of embodiment 3;

Fig. 6 is the structural diagram of embodiment 4;

FIG. 7 is a structural diagram of Embodiment 5. FIG.

detailed description:

The utility model will be introduced below through the embodiments shown in the accompanying drawings, but the utility model is not limited to the described implementation mode, and any improvement or substitution on the basic spirit of the present embodiment still belongs to the right of the utility model Scope of protection claimed:

Embodiment 1: An ore grinding system, including a roller press, a steady flow bin, a wind classification system and a dynamic screening system, the ore grinding system is arranged vertically.

During the ore grinding process, the crushed coarse ore first enters the wind classification system, and the wind classification system classifies the coarse ore, selects the fine ore that meets the particle size requirements, and sends it to the dynamic screening system. Coarse ore that meets the particle size requirements is fed into the steady flow bin, and then sent to the roller press through the collection and control of the steady flow bin, and the roller press grinds the coarse ore by rolling The coarse ore after roller pressing and grinding is sent to the wind classification system for classification again; the dynamic screening system screens the fine ore, selects the ultrafine ore that meets the particle size requirements and sends it to the next process, and repeats above steps.

Embodiment 2: As shown in Figure 4, a kind of ore grinding system includes roller press, steady flow bin, wind power classification system and power screening system, and described ore grinding system is arranged vertically; Roller press, steady flow bin , The wind classification system and the dynamic screening system are arranged in four layers in the longitudinal direction, from the bottom layer to the top layer in sequence from the first layer to the fourth layer, the roller press is set on the first layer, the steady flow bin is set on the second layer, and the wind force The classification system is set on the third floor, and the dynamic screening system is set on the fourth floor.

During the grinding process, the crushed coarse ore is first sent to the wind classification system located on the third floor. The wind classification system classifies the coarse ore and selects the fine ore that meets the particle size requirements and sends it to the fourth floor. The dynamic screening system, the coarse ore that does not meet the particle size requirements is fed into the steady flow bin on the second floor, and then sent to the roller press on the first floor through the collection and control of the steady flow bin. The roller press grinds the coarse ore, and the coarse ore after the roller is sent to the wind classification system for classification; the dynamic screening system screens the fine ore and selects the suitable particles The ultrafine ore required by the diameter is sent to the next process, and the above steps are repeated. Implementation effect of this embodiment:

1. The ore grinding system of the present embodiment occupies an area smaller than the ore grinding equipment of the prior art. Compared with the production scale of 70 tons of processing capacity per hour, the prior art occupies an area of about 1200 square meters, while the utility model occupies an area of It only needs 350 square meters, covers an area of 350 square meters, saving 71% of the floor area, and the transmission distance between devices is only 100 meters, reducing the transmission distance by 75%. The system consumes 17 degrees of electricity per hour, saving 26% of electric energy;

2. The product quality of the present embodiment: the particle size of the mineral powder can be regulated according to needs, the control range is wide, and the particle size of the mineral powder can be adjusted within the range of 55% to 95% of -200 mesh;

3. According to the scale setting of the existing technology with an hourly processing capacity of 70 tons, the hourly processing capacity of this embodiment is 84 tons, the output can be increased by 20%, and the efficiency can be increased by 20%.

Embodiment 3: As shown in Figure 5, a kind of ore grinding system includes roller press, steady flow bin, wind power classification system and power screening system, hoist, and described ore grinding system is arranged vertically; Roller press, The steady flow bin, the wind classification system and the dynamic screening system are arranged in three layers in the longitudinal direction, the roller press is arranged on the bottom layer, the steady flow bin is arranged on the middle layer, the wind classification system and the dynamic screening system are arranged on the top layer; the lifting The machine is connected with the roller press and the wind classification system, the roller press is connected with the steady flow bin, the steady flow bin is connected with the wind classification system, the wind classification system is connected with the dynamic screening The system is connected, the dynamic screening system is connected with the steady flow bin, and the connection between each device is realized by means of pipelines, non-standard slides, etc.

In the process of ore grinding, the crushed coarse ore first enters the wind classification system on the top floor through the hoist, and the wind classification system classifies the coarse ore, and selects the fine ore that meets the particle size requirements and sends it to the power plant on the top floor. Screening system, coarse ore that does not meet the particle size requirements is fed into the steady flow bin located in the middle layer, and then is collected and controlled by the steady flow bin and fed into the roller press at the bottom layer. Roller crushing is carried out, and the coarse ore after roller crushing is sent to the wind classification system for classification through the elevator; The ultra-fine ore is sent to the next process, and the above steps are repeated.

Implementation effect of this embodiment:

1. The ore grinding system of the present embodiment occupies an area smaller than that of the prior art, and compared with the production scale of 70 tons of processing capacity per hour, the prior art occupies an area of about 1200 square meters, while the utility model occupies an area of It only needs 350 square meters, which reduces the land occupation by 71%. At the same time, it also reduces the transmission distance of materials between various devices. The transmission distance of materials in the prior art is about 400 meters, but the utility model is only 70 meters, and the transmission distance is reduced by 82%. Simultaneously, energy consumption is also saved. Compared according to the same processing capacity, the prior art requires 23 kWh of electricity, while the utility model needs 15 kWh of electricity, saving 35% of electricity.

2. The product quality of the present embodiment has the following 4 advantages: at first dissociation is complete, ore raw material is under the effect of extruding force, and form with material bed, and mineral particle is dissociated and ground naturally according to crystallization formation surface, and metal mineral dissociation The second is that the microscopic particle shape of the product is beneficial to improve the work efficiency of the follow-up process, and the microscopic particle shape of the product of this embodiment is flaky and needle-shaped, which is conducive to pellet formation and improves the pelletizing efficiency by 30%; the third For non-magnetic ore, the product of this embodiment is beneficial to the follow-up flotation, and the foaming is fast. Compared with the prior art, it saves 15% of the dosage of chemicals; the fourth is that the particle size of the product can be adjusted, and the adjustment range is wide. The particle size is adjustable in the range of 55% to 95% of -200 mesh, and can be selected and controlled according to the actual production needs of users.

Ore has different characteristics. For magnetite, some magnetite has a coarse embedded particle size, and some have a very fine embedded particle size. Coarse ore, coarser when grinding, such as -200 mesh 60%, 65%, 70%, 75%, etc., finer particle size, finer when grinding, such as -200 mesh 80% , 85%, 90% and so on; and for non-magnetic minerals, there are also differences in the size of embedded particles, and the specific adjustment value can be determined according to the physical characteristics of a specific ore. Different mining enterprises, if some require -200 mesh 70%, some require -200 mesh 80%, some require -200 mesh 90%, these requirements can be realized by this grinding system.

3. Compared with the prior art, under the same production scale condition, the present embodiment has high output and high efficiency of processing ore. Compared with a production line with an hourly processing capacity of 70 tons, the grinding capacity of the prior art is 70t /h, while the processing capacity of this embodiment can reach 90t/h, increasing the output by 28.6%, and increasing the efficiency by 20%.

Embodiment 4: As shown in Figure 6, a kind of ore grinding system includes a roller press, a steady flow bin, a wind classification system and a power screening system, a hoist 1, and a hoist 2, and the ore grinding system is vertically arranged ;Roller press, steady flow chamber, wind classification system and dynamic screening system are arranged in three layers in the longitudinal direction. The system is set on the ground floor; the elevator 1 is connected with the roller press and the wind classification system, the elevator 2 is connected with the wind classification system and the steady flow bin, and the roller press is connected with the steady flow bin, The flow stabilization bin is connected to the wind classification system, the wind classification system is connected to the dynamic screening system, the dynamic screening system is connected to the flow stabilization bin, and the devices are connected through pipelines Or non-standard slips and other ways to achieve.

In the process of ore grinding, the crushed coarse ore first enters the wind classification system at the bottom through the hoist 1, and the wind classification system classifies the coarse ore, and selects the fine ore that meets the particle size requirements and sends them to the wind classification system at the bottom through the pipeline. The dynamic screening system on the top layer, the coarse ore that does not meet the particle size requirements is fed into the steady flow bin in the middle layer through the elevator 2, and then is collected and controlled by the steady flow bin and fed into the roller press in the bottom layer. The roller press grinds the coarse ore, and the coarse ore after the roller press is sent to the wind classification system through the hoist 1 for classification; the dynamic screening system screens the fine ore The ultra-fine ore that meets the particle size requirements is selected and sent to the next process, while the fine ore that does not meet the particle size requirements is fed into the steady flow bin through the pipeline, and then collected and controlled by the steady flow slave Feed into the roller press through the pipeline, and the roller press grinds the fine ore by rolling, and the fine ore after the roller pressing and grinding is sent to the wind classification system through the hoist 1 for classification, repeat above steps.

Implementation effect of this embodiment:

1. The ore grinding system of the present embodiment occupies an area smaller than that of the prior art, and compared with the production scale of 70 tons of processing capacity per hour, the prior art occupies an area of about 1200 square meters, while the utility model occupies an area of It only needs 400 square meters, which reduces the land occupation by 67%; at the same time, it also reduces the transmission distance of materials between various devices. The transmission distance of materials in the prior art is about 400 meters, but the utility model is only 100 meters, and the transmission distance is reduced by 75%. Simultaneously, energy consumption is also saved. Compared with the same processing capacity, the prior art requires 23 kWh of electricity, while the utility model needs 16 kWh of electricity, saving 30% of electricity.

2. The product quality of the present embodiment has the following 4 advantages: at first dissociation is complete, ore raw material is under the effect of extruding force, and form with material bed, and mineral particle is dissociated and ground naturally according to crystallization formation surface, and metal mineral dissociation The second is that the microscopic particle shape of the product is beneficial to improve the work efficiency of the follow-up process, and the microscopic particle shape of the product of this embodiment is flaky and needle-shaped, which is conducive to pellet formation and improves the pelletizing efficiency by 30%; the third Especially for non-magnetic ore, the product of the embodiment is beneficial to the subsequent flotation, and the foaming is fast, compared with the prior art, it saves 15% of the dosage of the medicament; the fourth is that the particle size of the product can be adjusted, the adjustment range is wide, and the particle size of the product The diameter can be adjusted within the range of 55% to 95% of -200 mesh, and can be selected and controlled according to the actual production needs of users.

Ore has different characteristics. For magnetite, some magnetite has a coarse embedded particle size, and some have a very fine embedded particle size. Coarse ore, coarser when grinding, such as -200 mesh 60%, 65%, 70%, 75%, etc., finer particle size, finer when grinding, such as -200 mesh 80% , 85%, 90% and so on; and for non-magnetic minerals, there are also differences in the size of embedded particles, and the specific adjustment value can be determined according to the physical characteristics of a specific ore. Different mining enterprises, if some require -200 mesh 70%, some require -200 mesh 80%, some require -200 mesh 90%, these requirements can be realized by this grinding system.

3. Compared with the prior art, under the same production scale condition, the present embodiment has high output and high efficiency of processing ore. Compared with a production line with an hourly processing capacity of 70 tons, the grinding capacity of the prior art is 70t /h, while the processing capacity of this embodiment can reach 90t/h, increasing the output by 28.6%, and increasing the efficiency by 20%.

Embodiment 5: As shown in Figure 7, a kind of ore grinding system includes roller press, steady flow bin, wind power grading system and dynamic screening system, and described ore grinding system is arranged vertically; Roller press, steady flow bin , The wind classification system and the dynamic screening system are arranged in four layers in the longitudinal direction, from the bottom layer to the top layer in sequence from the first layer to the fourth layer, the roller press is set on the first layer, the steady flow bin is set on the second layer, and the wind force The classification system is set on the third floor, and the dynamic screening system is set on the fourth floor; the roller press is connected to the steady flow bin, the steady flow bin is connected to the wind power classification system, and the wind power classification system is connected to the The dynamic screening system is connected, and the dynamic screening system is connected with the steady flow bin; the connection between each device is realized by means of pipelines, chutes or non-standard chute; the grinding system also includes a lifting machine; the outlet of the hoist is connected to the wind classification system, and the inlet of the hoist is connected to the roller press.

In the process of ore grinding, the crushed coarse ore is lifted by the elevator, and then fed into the wind classification system on the third floor through the pipeline. The ore is sent to the dynamic screening system on the fourth floor, and the coarse ore that does not meet the particle size requirements is fed to the steady flow bin on the second floor, and then is collected and controlled by the steady flow bin and fed to the first floor. In the roller press, the roller press performs rolling grinding on the coarse ore, and the coarse ore after rolling and grinding is sent to the elevator again, and the elevator lifts the coarse ore after rolling and grinding And feed it into the wind classification system for classification; the power screening system screens the fine ore, and selects the ultrafine ore that meets the particle size requirement and sends it to the next process, while the fine ore that does not meet the particle size requirement It is fed into the steady flow bin, and then fed into the roller press through the collection and control of the steady flow, and the roller press grinds the fine ore by rolling, and the fine ore is crushed by rolling The fine ore is sent to the hoist, and the hoist lifts the fine ore after rolling and grinding and sends it to the wind classification system for classification again, repeating the above steps.

Implementation effect of this embodiment:

1. The ore grinding system of the present embodiment occupies an area smaller than that of the prior art, and compared with the production scale of 70 tons of processing capacity per hour, the prior art occupies an area of about 1200 square meters, while the utility model occupies an area of It only needs 350 square meters, which reduces the land occupation by 71%. At the same time, it also reduces the transmission distance of materials between various devices. The transmission distance of materials in the prior art is about 400 meters, but the utility model is only 70 meters, and the transmission distance is reduced by 82%. Simultaneously, energy consumption is also saved. Compared according to the same processing capacity, the prior art requires 23 kWh of electricity, while the utility model needs 15 kWh of electricity, saving 35% of electricity.

2. The product quality of the present embodiment has the following 4 advantages: at first dissociation is complete, ore raw material is under the effect of extruding force, and form with material bed, and mineral particle is dissociated and ground naturally according to crystallization formation surface, and metal mineral dissociation The second is that the microscopic particle shape of the product is beneficial to improve the work efficiency of the follow-up process, and the microscopic particle shape of the product of this embodiment is flaky and needle-shaped, which is conducive to pellet formation and improves the pelletizing efficiency by 30%; the third Especially for non-magnetic ore, the product of the embodiment is beneficial to the subsequent flotation, and the foaming is fast, compared with the prior art, it saves 15% of the dosage of the medicament; the fourth is that the particle size of the product can be adjusted, the adjustment range is wide, and the particle size of the product The diameter can be adjusted within the range of 55% to 95% of -200 mesh, and can be selected and controlled according to the actual production needs of users.

3. Compared with the prior art, under the same production scale condition, the present embodiment has high output and high efficiency of processing ore. Compared with a production line with an hourly processing capacity of 70 tons, the grinding capacity of the prior art is 70t /h, while the processing capacity of this embodiment can reach 90t/h, increasing the output by 28.6%, and increasing the efficiency by 20%.

Ore has different characteristics. For magnetite, some magnetite has a coarse embedded particle size, and some have a very fine embedded particle size. Coarse ore, coarser when grinding, such as -200 mesh 60%, 65%, 70%, 75%, etc., finer particle size, finer when grinding, such as -200 mesh 80% , 85%, 90% and so on; and for non-magnetic minerals, there are also differences in the size of embedded particles, and the specific adjustment value can be determined according to the physical characteristics of a specific ore. Different mining enterprises, if some require -200 mesh 70%, some require -200 mesh 80%, some require -200 mesh 90%, these requirements can be realized by this grinding system.

4. The equipment adopts automatic control, which reduces the labor intensity of workers and facilitates maintenance.

5. The dust content of the air discharge in this embodiment is less than 20mg/Nm3, which is better than the environmental protection requirement that the dust discharge requirement stipulated by the national standard is not more than 30mg/Nm3, and has no air pollution.

Claims (14)

1. a grinding system, comprises roll squeezer, current stabilization storehouse, air classification system and power screening system, it is characterized in that: described grinding system is for longitudinally arranging; Described roll squeezer is positioned at the below of air classification system.

2. grinding system as claimed in claim 1, is characterized in that: roll squeezer, current stabilization storehouse, air classification system and power screening system are set to three layers or four layers in the vertical; Roll squeezer is positioned at bottom, power screening system is positioned at top layer, current stabilization position in storehouse in intermediate layer, air classification system is positioned at top layer, bottom or intermediate layer.

3. grinding system as claimed in claim 2, it is characterized in that: roll squeezer, current stabilization storehouse, air classification system and power screening system are set to four layers in the vertical, ground floor is followed successively by the 4th layer from bottom to top layer, roll squeezer is arranged at ground floor, current stabilization storehouse is arranged at the second layer, air classification Operation system setting is in third layer, and power screening system is arranged at the 4th layer.

4. grinding system as claimed in claim 2, it is characterized in that: roll squeezer, current stabilization storehouse, air classification system and power screening system are set to three layers in the vertical, roll squeezer is arranged at bottom, current stabilization storehouse is arranged at intermediate layer, air classification system and power screening system be arranged at top layer.

5. grinding system as claimed in claim 2, it is characterized in that: roll squeezer, current stabilization storehouse, air classification system and power screening system are set to three layers in the vertical, roll squeezer is arranged at bottom, current stabilization storehouse is arranged at intermediate layer, power screening system is arranged at top layer, and air classification Operation system setting is in bottom.

6. the grinding system as described in one claim as any in claim 1-5, is characterized in that: described roll squeezer is connected with described current stabilization storehouse, and described current stabilization storehouse is connected with described air classification system, and described air classification system is connected with described power screening system.

7. the grinding system as described in claim 1-5 any one claim, is characterized in that: described power screening system is connected with described current stabilization storehouse.

8. grinding system as claimed in claim 6, is characterized in that: described power screening system is connected with described current stabilization storehouse.

9. the grinding system as described in claim 3 or 4, is characterized in that: described grinding system also comprises elevator; Described elevator is connected with described roll squeezer with described air classification system.

10. grinding system as claimed in claim 5, is characterized in that: described grinding system also comprises elevator; Described elevator is connected with described current stabilization storehouse with described air classification system.

11. grinding systems as claimed in claim 6, is characterized in that: described being connected is connected by pipeline, chute, nonstandard scraper-trough conveyer, steel plate or canvas mode.

12. grinding systems as claimed in claim 7, is characterized in that: described being connected is connected by pipeline, chute, nonstandard scraper-trough conveyer, steel plate or canvas mode.

13. grinding systems as claimed in claim 8, is characterized in that: described being connected is connected by pipeline, chute, nonstandard scraper-trough conveyer, steel plate or canvas mode.

14. grinding systems as claimed in claim 9, is characterized in that: described being connected is connected by pipeline, chute, nonstandard scraper-trough conveyer, steel plate or canvas mode.